Measuring device.



N0. 819,243. 7 PATBNTED MAY 1, 1906. G. MOTHES.

MEASURING DEVICE.

APPLICATION FILED APE.6, 1905.

UNITED STATES PATENT OFFICE.

GEORG MOTHES, OF ESSEN-ON-THE-RUHR, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIENGESELLSOHAFT, OF-ESSEN-ON-THE-RUHR,

GERMANY.

MEASURING DE-VICE.

Specification of Letters Patent.

Patented May 1, 1906.

Application filed April 6, 1905. Serial No. 254,191.

provements in Measuring Devices, of which the following is a specification.

The present invention relates to measuring devices for use in marking or setting off points on work on the surface plate. It has hitherto been customary for this purpose to employ measuring-sticks arrangedin a vertical position relative to the surface plate and secured in a base-plate in such a manner that the zerooint of the measuring-stick coincides wit the plane of the surface plate.

The use of such measuring-sticks, however,v

permits of the measurements of the drawing eing directly used only when the said measurements are reckoned on the drawing from a base-line, which on the work to be inscribed corresponds to a plane that coincides withv the plane of the surface plate.

In many instances the measurements on the drawing are reckoned from a base-line which on the work to be marked corresponds to a plane that is parallel but not coinciding with the plane of the surfaceplate table. When the measuring-sticks are made use of in such case, the distance between said baseline and the plane of the surface late has to be taken in consideration, an when the measurements are taken from the drawin this distance must be added to or subtracted from each measurement, accordin to whether the measurements are located ahove or below the base. This proceeding, however, consumes a great deal of time, and errors are likely to occur by reason of the calculation which has to be made for every measurement.

The object of the present invention is to provide a measuring device which makes it possible to take directly by the measuring device the measurements indicated on the drawin at anylocation of the base-line above the sur ace plate without necessitating previous determination of the distance between the base-line and the surface plate.

on line 3 3-, Fig. 2, and seen from above; and Fig. 4 is a section on line 4 4, Fig. 2.

An endless measuring-tape A passes over two rolls B and O, which by means of shafts B and C are arranged in the column-shaped part D of the frame D E. The other part of v the frame D E is formed by the base-plate E, having a plane bottom face 6'. The column D is of U-shaped cross-section. The crosspiece D, which connects the two flanges of the column, is on its outer face rovided with a longitudinal guide-groove Fi 4, extending vertically or at a right angle to the bottom face 6 of the base-plate E. The groove 61 is of the same cross-section as the measuring tape A and'receives the scaled portion of the tape, which is capable of sliding in the groove.

The roll B is loosely arranged on the shaft B to rotate thereon, while the roll 0 is nonrotatably secured on the shaft O. The shaft O in its turn is rotatably arranged in the reinforced arts (1 d of the column D and held from axiafmovement by means of a nut c and a'collar 0 The shaft 0 extends beyond the collar 0 to form a cylindric part c and a art 0 providedwith ri ht-hand screwthrea s. On the collar 0 0 the shaft C a worm-wheel F is loosely arranged. The worm-wheel F is capable of rotation on the collar 0 but held from longitudinal movement on the same. The worm-wheel engages a worm G, carrying a hand-wheel G and havin its spindle rotatably mounted in a bearing which is screwed onto the part (I of the column D.

On the cylindric part c of the shaft O a hand-wheel H is splined, so as to be incapable of rotation, but capable of axial movement. The worm-wheel F may be coupled to the hand-wheel H through the medium of a friction-clutch. To that end the hub of the hand-wheel H is provided with a cone h, which corresponds to a conical recess in the interior face of the worm-wheel F: The screw-threads of the shaft part c engage a nut J, which carries a hand-wheel J and is rotatably connected with the hand-wheel H, but incapable of longitudinal movement relatively to the same. On the free end of the screw-spindle c is secured a disk 0 which limits the movement of the nut J on the screw-spindle. The clutch connection f h is made or broken by the turning of the handwheel J". it As the screw-spindle provided Withright-hand scre threads, a turningof the hand-Wheel J in the direction of the arrow at, Fig=1,wi1l result in the'wormevvheel F being coupled to the hand-Wheel H, While a turning of the hand-Wheel J in theopposite,

direction Will unoouple the said parts.

.On the frontof the column D is, arranged av Vernier-adjusting device K K, Which is capable of sliding in grooves d in the column D.

The upper part ofthe Vernier device. can be si ecured in position on the. cplu inn l) by means M i-W While the ower partgli, wh carries ,the vernier-scale, is adjustable ,rlela; may to. the .partK. threughjthejmedijintbf I a micrometer-screw lci 'ournaled in the aft K.

,, J] ,l v

s-ta a broug t to register, with the, 1

The per tioni f theinr ntiQe 'afs fqll w Letit be assumedthap it desire a W -pi 0n, the. surfaee Plate t r a. rawing .on. which. the mfias l fim llt ar re k'q'n r mia certain ba e inalivhiqh n the, tur p e e a kedaqerrespall te aplafl tu i d rcertaindistalw ab ve thesurf qeig a e v of. the surface plate, one ,cannot directly adju the n i t bec use t e m as n taper does 1 1Qt re;ach th e surface plate, order to. make it possible'alsoin ,this instance touse the. measuring device, thecolumn D is onibothhedges of the tape Aprovidedixvith marksgM, andabove the zero-point the measvuringetape, i-has, mark llelf di tan e" 10f the marks. M the. bottom face e ,tfhe ba l i .equal.t ,,.th v d sta ce J' f t marks N from 'the'zero-point of the measur- Thus whenv th a e. N. a

a ,Mth Zero-point Will beladjusted tothe plane ofjthe u a p tef h is. t9. .say,.ithef su in .device can also in this instance be used for directly, taking the measurements indicated T dj tmen f h Z ro-mint (er-Of t marks -N0f the measuring-tape isin'the niost suitable Qmann er, effected by, making the V i a jus nt 3?tur ingthhai -w ,ing-ithe hand-Wheel G? the fine adjustment is H 1 n i g. h d ch iq mit o f brokenm This done, the f han d WheelZ is c-loupledto theQ orm-wheelF, and turneifected. 1, H

The, ver fer.deyiceKKiprbyides for adjustmentlof the measuring-tape.

Having thus described my invention, tvhat I 2. A measuring device comprising a frame having a plane'bottom'faca'a measuringtape u'stable vffiiean on said frame, and een a s are extending in i opposite *diiect ionslfflom the Zerooint, nieansguiding the frame and means for of, the measuri ig tfap spbnding to the bottom face of the frame, Without projectingthe measure below the t-9 5a f l ef 3 Ame ringdevicec'ofiri'prising"a frame,

ta e adj ustable thereon, and havirig a scale exffei'idiiig in opposite directions a 'zer'o poinfiahd means for guiding the tape at right -angles to the bottom of the frame.

v measuring device comprising'a frame, having a plane bottom "face, a" measuringt'ape movable vertically on'sa'id' frame, means attire bb'ttjom ofthe frame-around tvhichthe 'tapepas'sesfa 'mafk on the measuring-tape,

and a friarkbnthe frame at such a distance above thebottomface tl'iatWvhen the mark 611 1, the tape coincidestherewith, the Zerothe tape isiri afpbs'ition' correspond- I mg tofthe'plane 'ofthe base of the bottom of thehfranfe.

Amea'suririg device comprising a frame, a measuring-tape 'inovable'onsaid frame, "means guiding the tapeat right angles to the bottom ofith ffarriefaroller around which the tape' as'es, and 'ir'ieans'for adjusting 'the {roller comprising" means for giving theroller I roug-Hadjtsement and means for giving'it a fineiadjii stimnt.

6, rhea'siiring" device ,cbihpris'ing a frame,

rrieasiuref adj'iistable 'on said frame, a shaft for "transmitting" motion 'to' said measure a hand vvhe'el causingthe" shaft to "turn there with" and movable" axially "on the shaft, a [worm-wheel;surroundingthe shaft and with which thehand tvheel engages wherrmoved Xially'infonef direction and a Worm'for adut n thewergn-ehe i;

i 7 'fA measuringd'eviteeompnsing a frame,

v 'po siteidire'ctionfrom the Zeropoint," a Vernier adjustable onthe frame'over the measure to provide forfineadjustm'ent andtfreaiis for movingthe rneasureto bring "the""zeifiypiaint to a germ corresponding t'v'ith the bottom face of t e frame Without proj ecte to a position corre ing the measure below the bottom face of the frame.

8. A measuring device comprising a frame provided with vertical grooves-and a plane bottom face, a measure adjustable vertically on the frame and a Vernier adapted to travel in the grooves on the frame and over the measure, said vernier comprising tWo parts one of which carries a set-screw for securing the Vernier in different positions on the frame and the other of which carries a Vernier-scale and is connected to the first part by a micrometer-screw.

9. A measuring device of the class described, comprising a frame having a plane bottom face, a pair of rolls rotatably arranged in said frame, an endless measuringtape passing over said rolls, said tape having scales extending in opposite directions from a zero-point, and means for adjusting the tape Within the frame.

The foregoing specification signed at Dusseldorf, Germany, this 27th day of March.

GEORG MOTHES. In presence of WILLIAM EssENWEIN} PETER LIEBER. 

